Motoped - Mountain Bike Meets Moped. I wasn't sure where to pin this

Motopeds Survival Bike is the Ultimate in Pedal-Power Adventuring

Jay Leno in his 1917 Fiat Botafogo Special - picture from Zalephotoart.com

#steampunk

Motorised Submersible Canoe (MSC) nicknamed the 'Sleeping Beauty'. Released from a submarine near the target and powerd by an electric motor, they were intended to place an explosive charge on the hull of anchored enemy ships. They only saw limited use, notably when they sank two Jap ships in Phuket harbour, Thailand.